CN114197525A - Verticality control method for steel pipe column by back-inserting method - Google Patents
Verticality control method for steel pipe column by back-inserting method Download PDFInfo
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- CN114197525A CN114197525A CN202111433585.2A CN202111433585A CN114197525A CN 114197525 A CN114197525 A CN 114197525A CN 202111433585 A CN202111433585 A CN 202111433585A CN 114197525 A CN114197525 A CN 114197525A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention relates to a verticality control method of a rear-inserting steel pipe column, which comprises the steps of selecting at least three first measurement sections in the whole of a temporarily butted steel pipe column and a tool column, and obtaining coordinates of top measurement points and side measurement points of all the first measurement sections; the coordinates of the top measuring points of two adjacent first measuring sections are used for obtaining a first evaluating line, and corresponding first offset is obtained according to the coordinates of the top measuring points of the other first measuring sections and the first evaluating line; coordinates of side measuring points of two adjacent first measuring sections are used for obtaining a second evaluating line, and corresponding second offset is obtained according to the coordinates of the side measuring points of each of the other first measuring sections and the second evaluating line; and obtaining the butting precision of the steel pipe column and the tool column at the position corresponding to the first measurement section through the first offset and the second offset. The method can more accurately acquire the butt joint precision, offset and offset direction of the steel pipe column and the tool column, and improves the verticality control effect of the steel pipe column in the back inserting method.
Description
Technical Field
The invention relates to a perpendicularity control technology of a steel pipe column in a tunnel and underground engineering, in particular to a perpendicularity control method of a steel pipe column by a rear insertion method.
Background
In the construction process of the steel pipe column by the rear insertion method, the steel reinforcement cage is lowered to an underground designated position, then positioning installation of the universal platform and butt joint of the steel pipe column and the tool column are implemented, and then the tool column is hung by a crane and then the steel pipe column is lowered to the designated height where the steel pipe column enters the underground. The rear-inserting method steel pipe column construction process is mainly characterized by positioning of a universal platform and controlling the perpendicularity of the steel pipe column, and the perpendicularity control of the steel pipe column comprises two parts, namely control of the butt joint precision of the steel pipe column and a tool column and control of the hoisting perpendicularity of the steel pipe column. The steel-pipe column is as subway building's main atress structure, and the straightness control of hanging down of steel-pipe column satisfies the requirement and can guarantee the construction precision of back grafting method steel-pipe column, just can guarantee subway building's construction safety. Wherein, when the length of steel-pipe column is too long, the unable whole of producing of steel-pipe column carries out the transportation, so can transport the steel-pipe column merogenesis, transports the scene after, can weld the steel-pipe column merogenesis, the straightness that hangs down after the steel-pipe column merogenesis is assembled after the welding also needs control.
In the prior art, the positioning of the universal platform generally adopts a cross center-dividing vertical line method, which is more conventional. In the control of the butting precision of the steel pipe column and the tool column, the steel pipe column and the tool column are butted by adopting a flange plate, the butting precision is difficult to control due to the large diameter difference between the tool column and the steel pipe column, and the prior art does not have a method capable of well controlling the butting precision of the steel pipe column and the tool column. And the precision of steel-pipe column and instrument post butt joint precision is relatively poor can influence steel-pipe column hoist and mount straightness control of hanging down, whether perpendicular generally is through omnipotent platform machinery measurement when current steel-pipe column hoist and mount, and directly carry out retest to steel-pipe column hoist and mount straightness that hangs down through the total powerstation, the clamping device of the omnipotent platform of rethread is adjusted, current mode that detects through the total powerstation can only be simple measure the steel-pipe column incline direction when vertical and slope, can't judge the steel-pipe column slope degree, make the process of adjusting through the cohesion device of omnipotent platform is difficult to the accuse adjustment degree, this very big regulation efficiency that has influenced the steel-pipe column.
Disclosure of Invention
The invention aims to: the perpendicularity control method of the rear-inserting steel pipe column is provided, and aims to solve the problems that in the prior art, the diameter difference between a tool column and the steel pipe column is large, the butt joint precision is difficult to control, the control precision and control efficiency of the hoisting perpendicularity of the steel pipe column are influenced, and further the perpendicularity control effect and efficiency of the rear-inserting steel pipe column are influenced.
In order to achieve the purpose, the invention adopts the technical scheme that:
a verticality control method of a rear-inserting method steel pipe column comprises the step S1 of controlling the butting precision of the steel pipe column and a tool column; step S1 includes the following steps:
s11, respectively transversely placing the steel pipe column and the tool column on a base, aligning the corresponding end faces of the steel pipe column and the tool column, and temporarily connecting the steel pipe column and the tool column through a flange plate;
s12, selecting at least three first measurement sections on the steel pipe column and the tool column, wherein the two first measurement sections are respectively located at the end parts of the steel pipe column and the tool column, the end parts are deviated from each other, a top measurement point of the first measurement section and a side measurement point on one side of the first measurement section are marked, all the side measurement points are located on the same side, the side measurement point and the top measurement point of the same first measurement section are distributed at an included angle of 90 degrees relative to the first measurement section, and corresponding coordinates of the top measurement point and the side measurement point of each first measurement section are respectively obtained;
s13, obtaining first evaluation lines according to the coordinates of the top measuring points of two adjacent first measuring sections, and obtaining the distance between the coordinates of the top measuring points of each of the other first measuring sections and the first evaluation lines to obtain a first offset corresponding to the first measuring sections; obtaining a second evaluation line according to the coordinates of the side measuring points of two adjacent first measurement sections, and obtaining the distance between the coordinates of the side measuring points of each of the other first measurement sections and the second evaluation line to obtain a second offset of the corresponding first measurement section; then, obtaining the butting precision of the steel pipe column and the tool column at the corresponding first measurement section through the first offset and the second offset at each first measurement section;
s14, if the butting precision of the steel pipe column and the tool column at the first measurement section is larger than a first preset value, adjusting the temporary connection position of the flange plate according to the corresponding first offset and the second offset to enable the butting precision of the steel pipe column and the tool column to be smaller than the first preset value.
The steel-pipe column and the instrument post are transversely placed on the base, and the base is current structure, and it has structures such as cylinder, can realize rotation and support etc. to steel-pipe column, instrument post. The diameter of instrument post is greater than the diameter of steel-pipe column, and is corresponding, and the support cylinder of instrument post can be less than the support cylinder of steel-pipe column for both axle centers are approximately equal to on a straight line when the instrument post of being convenient for and support column pass through the ring flange and dock temporarily. When the tool column and the support column are temporarily butted through the flange plates, the bolts between the two flange plates are in a loose state and are not locked, so that the butt joint precision of the steel pipe column and the tool column can be adjusted according to the subsequent butt joint precision. The side surface of the first measurement section refers to the side surface of the steel pipe column or the tool column, and the first measurement section refers to the cross section of the steel pipe column or the tool column.
In the scheme, coordinate measurement is carried out on the integral top measuring point and the side measuring point on one side of the integral top measuring point and the side measuring point of the integral top measuring point of the temporarily butted steel pipe column and tool column, the coordinate measurement is used for calculating the actual butting precision of the butted steel pipe column and tool column, the number of first measuring sections is at least 3, and two first measuring sections are required to be respectively positioned at the end parts of the steel pipe column and the tool column, so that the offset existing after the steel pipe column and the tool column are primarily butted can be more accurately reflected; the coordinates of the top measuring points of two adjacent first measuring sections are used for obtaining a first evaluation line, and a first offset corresponding to the first measuring section is obtained by calculating the distance between the coordinates of each of the other first measuring sections and the first evaluation line; coordinates of side measuring points of two adjacent first measuring sections are used for obtaining a second evaluation line, and distances between the coordinates of the other first measuring sections and the second evaluation line are obtained to obtain a second offset corresponding to the first measuring sections; the method can accurately acquire the butting precision of the steel pipe column and the tool column, the butting offset and the butting offset direction, and is further favorable for quickly adjusting the butting of the steel pipe column and the tool column according to the first offset and the second offset, so that the butting precision control effect of the steel pipe column and the tool column is better, the efficiency is higher, the verticality control effect of the steel pipe column by the back-inserting method is better, and the overall control efficiency is higher.
Preferably, in step S12, after the first measurement cross section is selected, the rope with two ends connected to the plummet is spanned above the first measurement cross section, so that the plummet at the two ends of the rope are located at two sides of the first measurement cross section, and the tangent point of the marking rope and the side of the first measurement cross section is a side measuring point.
By the mode, after the plumbs at the two ends of the rope are kept static, the side measuring points of each first measuring section can be accurately marked, so that the coordinates measured according to the side measuring points of the first measuring sections are more accurate, the second evaluation line, the second offset and the butt joint precision of the steel pipe column and the tool column are more accurate in sequence, and the butt joint precision control of the steel pipe column and the tool column is facilitated.
Preferably, in step S12:
after the positions of the side measuring points are marked, the reflecting sheet is adhered to the corresponding side measuring points on the rope, and coordinates of the side measuring points are obtained through the measurement of the total station and the reflecting sheet;
after the positions of the top measuring points are marked, the prisms are arranged at the corresponding top measuring points, and coordinates of the top measuring points are obtained through the measurement of the total station and the prisms.
The reflecting sheet is adhered to the rope at the side measuring point, so that the measuring cost can be reduced, and the measuring efficiency is improved. The total station is matched with the reflector plate and the prism to respectively correspond to the measured coordinate and the coordinate, the fact that whether the steel pipe column and the tool column are in a horizontal state or not after being initially butted does not need to be considered in the measuring process, the measuring condition is less limited, the coordinate of the side measuring point and the coordinate of the top measuring point can be measured more conveniently and accurately, and the measuring precision and the measuring efficiency can be improved.
Preferably, in step S12: the first evaluation line is obtained by coordinates of a first measurement section farthest from the steel pipe column and a top measurement point on an adjacent first measurement section, and the second evaluation line is obtained by coordinates of a first measurement section farthest from the steel pipe column and a side measurement point on an adjacent first measurement section, so that the first evaluation line and the second evaluation line can more accurately reflect the butt joint precision of the steel pipe column and the tool column.
Preferably, in step S12: the first measuring sections are located at two ends of the tool column, two ends of the steel pipe column and the longitudinal middle part.
Through selecting the first measurement section of above-mentioned position for the butt joint precision of reaction steel-pipe column and instrument post can carry out the recheck to the butt joint precision of steel-pipe column and instrument post that obtains, makes the butt joint precision that finally obtains steel-pipe column and instrument post more accurate, reduces because of steel-pipe column and instrument post self roughness to the acquisition of the butt joint precision of steel-pipe column and instrument post cause the influence.
Preferably, in step S14: the first preset value is 0.1%, if the difference between the butting precision of the steel pipe column and the tool column at the first measurement section and the first preset value is 0.05% more, a gasket is arranged on the offset side between the two flange plates of the end faces of the steel pipe column and the tool column, and the thickness of the gasket is 0.5 mm.
The verticality of the steel pipe column by the back-inserting method needs to be controlled to be 0.2%, and the butting precision of the steel pipe column and the tool column is controlled to be 0.1% in the butting stage of the steel pipe column and the tool column, so that more control redundancy exists in the subsequent steel pipe column hoisting verticality control. Such as: and if the difference value between the butting precision of the steel pipe column and the tool column at the first measurement section and the first preset value is 0.15%, a cushion block of 0.5mm is arranged on the offset side corresponding to the offset direction of the steel pipe column, so that the steel pipe column returns to the positive direction in the opposite direction of the offset direction, and the butting of the steel pipe column and the tool column can be quickly and accurately adjusted according to the obtained butting precision of the steel pipe column and the tool column.
Preferably, the method also comprises a step S2 of controlling the hoisting verticality of the steel pipe column; step S2 includes the following steps:
s21, arranging two total stations at 90 degrees by taking the tool post as a reference point;
s22, marking two end parts of the corresponding side of the tool post with a first measuring point respectively at two total stations through a laser instrument, measuring the coordinates of the two first measuring points at the corresponding side by each total station, obtaining a deviation value of the corresponding side according to the coordinates of the two first measuring points at each side, obtaining a total deviation direction and a total deviation distance of the tool post according to the deviation values of the tool post at two sides corresponding to the two total stations, and obtaining the lifting verticality of the tool post according to the total deviation distance of the tool post;
and S23, if the obtained hoisting verticality of the tool column is larger than a second preset value, adjusting the steel pipe column through a clamping device of the universal platform according to the obtained total offset direction and the total offset distance of the tool column, so that the hoisting verticality of the steel pipe column is smaller than the second preset value.
When the steel pipe column is hoisted, the universal platform can mechanically measure whether the steel pipe column is vertical or not during hoisting. Because the butt joint precision of instrument post and steel-pipe column is controlled for can reflect the hang straightness that hangs down of steel-pipe column through instrument post hang straightness that hangs down. By adopting the above mode to retest the hoisting verticality of the tool column, the hoisting verticality, the total offset direction and the total offset distance of the tool column can be more accurately obtained, and the hoisting verticality of the steel pipe column can be conveniently controlled. And the hoisting verticality inspection of the steel pipe column is completed together with the mechanical measurement of the universal platform through manual measurement, so that a double-insurance mechanism for controlling the hoisting verticality of the steel pipe column is realized.
Preferably, the method further comprises the step S2', controlling the hoisting verticality of the steel pipe column; step S2' includes the following steps:
s21', two second measurement cross sections are taken at two ends of the tool post, and at least three second measurement points are respectively selected in the circumferential direction of each second measurement cross section;
s22', obtaining coordinates of all second measuring points through total station measurement;
s23', fitting the coordinates of all the second measuring points of each second measuring section to obtain the center coordinates of the corresponding second measuring section;
s24', obtaining the total offset direction and the total offset distance of the tool column according to the circle center coordinates of the two second measurement sections, and obtaining the hoisting verticality of the tool column according to the total offset distance of the tool column;
s25', if the obtained hoisting verticality of the tool column is larger than a second preset value, adjusting the steel pipe column through a clamping device of the universal platform according to the obtained total offset direction and the total offset distance, so that the hoisting verticality of the steel pipe column is smaller than the second preset value.
Through the mode, the circle center coordinates of the two second measurement sections can be directly obtained, namely whether the circle centers of the two second measurement sections of the tool column are on the same vertical line or not can be directly reflected, so that the hoisting verticality, the total offset direction and the total offset distance of the reaction tool column can be quickly and accurately reflected, and the hoisting verticality of the steel pipe column can be conveniently controlled. And the hoisting verticality inspection of the steel pipe column is completed together with the mechanical measurement of the universal platform through manual measurement, so that a double-insurance mechanism for controlling the hoisting verticality of the steel pipe column is realized.
Preferably, in step S21', a laser instrument is used to mark the second measurement cross section at the same side of the tool post at both ends of the tool post, and then the second measurement point is selected, so that the accuracy of the coordinates of the second measurement point can be improved, the number of laser instruments and total stations can be reduced, the operation difficulty can be reduced, the cost can be saved, and the construction efficiency can be improved.
Preferably, the top of the steel reinforcement cage is a bell mouth, the maximum diameter of the top of the steel reinforcement cage is 8-12cm larger than the diameter of the bottom of the steel reinforcement cage, the contact between a stud at the bottom of a steel pipe column and the steel reinforcement cage in the hoisting process of the steel pipe column is avoided, and the influence on the positioning of the steel pipe column is reduced.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the verticality control method of the rear-inserting steel pipe column, the butt joint precision, the butt joint offset and the butt joint offset direction of the steel pipe column and the tool column can be more accurately obtained, and therefore the butt joint of the steel pipe column and the tool column can be rapidly adjusted according to the first offset and the second offset, the butt joint precision control effect of the steel pipe column and the tool column is better, the efficiency is higher, the verticality control effect of the rear-inserting steel pipe column is better, and the overall control efficiency is higher.
2. The plumbs are arranged at the two ends of the rope and are arranged above the horizontally arranged steel pipe column or tool column in a spanning mode, after the plumbs at the two ends of the rope are kept static, the side measuring points of each first measuring section can be accurately marked, further, the coordinates measured according to the side measuring points of the first measuring sections are accurate, the second evaluation line, the second offset and the butting precision of the steel pipe column and the tool column are accurate in sequence, and the butting precision control of the steel pipe column and the tool column is facilitated.
3. The steel pipe column hoisting verticality inspection is completed through manual measurement and mechanical measurement of the universal platform, a double-insurance mechanism for controlling the hoisting verticality of the steel pipe column is realized, the tool column hoisting verticality, the offset direction and the offset distance can be more accurately obtained, and the steel pipe column hoisting verticality is conveniently controlled.
Drawings
FIG. 1 is a first schematic view showing the positions of a first measurement section, a top measurement point and a side measurement point in example 1;
FIG. 2 is a schematic view showing the positions of a first measurement section, a top measurement point and a side measurement point in example 1;
FIG. 3 is a schematic view of side measurement point marks in example 1;
FIG. 4 is a schematic view of a first evaluation line and a first offset amount in example 1;
FIG. 5 is a schematic diagram showing the position of a first measuring point in the control of the verticality of the steel pipe column hoisting in example 1;
fig. 6 is a schematic plane position diagram of a first measuring point and a total station in the control of the hoisting verticality of the steel pipe column in embodiment 1;
fig. 7 is a schematic diagram of the positions of a second measurement section and a second measurement point in the control of the verticality of the steel pipe column hoisting in embodiment 2.
Icon: 1-steel pipe column; 2-a tool post; 3-a base; 4-a first measurement section; 41-top measuring point; 42-lateral measurement point; 51-a rope; 52-plumb bob; 5-a first measurement point; 6-second measuring section; 61-second measurement point; 7, a crane; 8-a universal platform; 10-total station.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides a perpendicularity control method of a steel pipe column by a back-inserting method, and referring to fig. 1-4, the method comprises the steps of S1, controlling the butting precision of a steel pipe column 1 and a tool column 2; step S1 includes the following steps:
s11, respectively transversely placing the steel pipe column 1 and the tool column 2 on a base 3, aligning the corresponding end faces of the steel pipe column 1 and the tool column 2, and temporarily connecting the steel pipe column 1 and the tool column 2 through a flange plate;
the steel pipe column 1 and the tool column 2 are transversely placed on the base 3, the base 3 is of an existing structure and has a structure such as a roller, and the steel pipe column 1 and the tool column 2 can be rotated and supported, and the like, as shown in fig. 1-2. The diameter of tool post 2 is greater than the diameter of steel-pipe column 1, and is corresponding, and the support cylinder of tool post 2 can be less than the support cylinder of steel-pipe column 1 for the axle center of both is approximately equal to on a straight line when being convenient for tool post 2 and support column pass through the ring flange and dock temporarily, but there is certain deviation in the butt joint of steel-pipe column 1 and tool post 2. When the tool column 2 and the support column are temporarily butted through the flange plates, the bolts between the two flange plates are in a loose state and are not locked, so that the butt joint precision of the steel pipe column 1 and the tool column 2 obtained subsequently can be adjusted.
S12, selecting at least three first measurement sections 4 on the steel pipe column 1 and the tool column 2, wherein the two first measurement sections 4 are respectively located at the end parts of the steel pipe column 1 and the tool column 2, the end parts are deviated from each other, a top measurement point 41 of the first measurement section 4 and a side measurement point 42 on one side of the first measurement section 4 are marked, all the side measurement points 42 are located on the same side, the side measurement point 42 and the top measurement point 41 of the same first measurement section 4 are distributed at an included angle of 90 degrees with respect to the first measurement section 4, and corresponding coordinates of the top measurement point 41 and the side measurement point 42 of each first measurement section 4 are respectively obtained;
in the scheme, coordinate measurement is performed on the whole top measuring point 41 and the side measuring point 42 on one side of the whole top measuring point 41 and the side measuring point 42 of the steel pipe column 1 and the tool column 2 after temporary butt joint, the butt joint precision of the steel pipe column 1 and the tool column 2 after butt joint is calculated, the number of the first measuring sections 4 is at least 3, and two first measuring sections 4 are required to be respectively located at the end parts of the steel pipe column 1 and the tool column 2, which deviate from each other, as shown in fig. 1-2, so that the offset existing after temporary butt joint of the steel pipe column 1 and the tool column 2 can be accurately reflected.
In the present embodiment, after the first measurement section 4 is selected in step S12, the rope 51 having both ends connected to the plummet 52 is first laid over the first measurement section 4, so that the plummet 52 at both ends of the rope 51 are located on both sides of the first measurement section 4, respectively, and as shown in fig. 3, the tangent point between the rope 51 and the side of the first measurement section 4 is the side measurement point 42. In this way, after the plummet 52 at the two ends of the rope 51 is kept still, the side measuring points 42 of the first measuring section 4 can be marked more accurately, and the coordinates measured according to the side measuring points 42 of the first measuring section 4 can be made more accurate.
In the present embodiment, in step S12: the measuring instrument adopts a total station 10; after marking the position of the side measuring point 42, the reflector plate is adhered to the rope 51 corresponding to the side measuring point 42, so that the measurement cost can be reduced, and if a fixing device of the reflector plate is not needed to be arranged independently, the reflector plate can be quickly installed at the side measuring point 42 of the first measurement section 4, and the total station 10 is matched with the reflector plate to measure and obtain the coordinates of the side measuring point 42, so that the measurement efficiency can be improved. After the positions of the top measuring points 41 are marked, the prisms are arranged at the corresponding top measuring points 41, and coordinates of the top measuring points 41 are obtained through the total station 10 in cooperation with the prism measurement. The total station 10 is matched with the reflector plate and the prism to respectively correspond to the coordinates of the measuring side measuring point 42 and the coordinates of the measuring top point 41, whether the steel pipe column 1 and the tool column 2 are in a horizontal state after being temporarily butted does not need to be considered in the measuring process, the measuring conditions are less limited, the coordinates of the measuring side measuring point 42 and the coordinates of the measuring top point 41 can be measured more conveniently and accurately, and the measuring precision and the measuring efficiency can be improved. Of course, the measuring instrument may also adopt a theodolite, a level gauge and the like, but the corresponding limiting conditions are more, and the steel pipe column 1 and the tool column 2 need to be integrally leveled, so that the measurement of the butt joint precision of the steel pipe column 1 and the tool column 2 can be ensured.
Preferably, in step S12: the first measuring sections 4 are positioned at two ends of the tool column 2, two ends of the steel pipe column 1 and the longitudinal middle part. Namely, the two ends of the tool column 2 are respectively provided with a first measuring section 4, the two ends of the steel pipe column 1 and the longitudinal middle part of the steel pipe column 1 are respectively provided with a first measuring section 4, as shown in fig. 2, the first measuring sections 4 are used for reflecting the butt joint precision of the steel pipe column 1 and the tool column 2, and the obtained butt joint precision of the steel pipe column 1 and the tool column 2 can be rechecked, so that the butt joint precision of the steel pipe column 1 and the tool column 2 is more accurate, and the influence on the acquisition of the butt joint precision of the steel pipe column 1 and the tool column 2 caused by the flatness of the steel pipe column 1 and the tool column 2 is reduced.
S13, obtaining a first evaluation line according to the coordinates of the top measuring points 41 of two adjacent first measuring sections 4, and obtaining the distance between the coordinates of the top measuring points 41 of each of the rest first measuring sections 4 and the first evaluation line to obtain a first offset corresponding to the first measuring section 4; obtaining a second evaluation line according to the coordinates of the side measuring points 42 of the two adjacent first measurement sections 4, and obtaining the distance between the coordinates of the side measuring points 42 of each of the other first measurement sections 4 and the second evaluation line to obtain a second offset of the corresponding first measurement section 4; then, obtaining the butting precision of the steel pipe column 1 and the tool column 2 at the corresponding first measuring section 4 through the first offset and the second offset at each first measuring section 4;
when the first evaluation line and the first offset are obtained, if the first measurement section 4 of the steel pipe column 1 is needed, the coordinates of the top measurement point 41 of the first measurement section 4 of the steel pipe column 1 can be directly used; if the first measurement section 4 of the tool column 2 is needed, the coordinate of the top measurement point 41 of the first measurement section 4 on the tool column 2 needs to subtract the radius difference between the tool column 2 and the outer wall of the steel pipe column 1 from the value of the z coordinate, so that the coordinate of the top measurement point 41 of the first measurement section 4 on the tool column 2 is mapped on the annular surface where the outer wall of the steel pipe column 1 is located, then the first measurement line and the first offset are calculated by using the coordinate of the mapped top measurement point 41, as shown in fig. 4, point a is the top measurement point 41 of the first measurement section 4 on the tool column 2, and points b and c are both the top measurement point 41 of the first measurement section 4 of the steel pipe column 1, and when the first evaluation line is obtained by using the coordinates of point a and point b, the z value of the coordinate of point a needs to subtract the radius difference between the tool column 2 and the outer wall of the steel pipe column 1, corresponding to the coordinate of point a', and the coordinate of point b is used to obtain the first evaluation line, and then calculating the distance L from the point c to the first evaluation line, namely the first offset of the first measurement section 4 where the point c is located, wherein the offset direction is downward. Of course, the coordinates of the top measuring point 41 of the first measured cross section 4 of the steel pipe column 1 may be mapped on the annular surface on which the outer wall of the tool column 2 is located by directly using the coordinates of the top measuring point 41 of the first measured cross section 4 on the tool column 2. Similarly, when the second evaluation line and the second offset are obtained, the coordinates of the side measuring point 42 of the first measurement section 4 of the steel pipe column 1 need to be mapped on the annular surface of the outer wall of the tool column 2, or the coordinates of the side measuring point 42 of the first measurement section 4 of the tool column 2 need to be mapped on the annular surface of the outer wall of the steel pipe column 1.
Preferably, the first evaluation line is obtained by coordinates of a first measurement section 4 farthest from the steel pipe column 1 and a top measurement point 41 on the adjacent first measurement section 4, and the second evaluation line is obtained by coordinates of a first measurement section 4 farthest from the steel pipe column 1 and a side measurement point 42 on the adjacent first measurement section 4, so that the first evaluation line and the second evaluation line can more accurately reflect the butting precision of the steel pipe column 1 and the tool column 2.
And S14, if the butting precision of the steel pipe column 1 and the tool column 2 at the first measurement section 4 is larger than a first preset value, adjusting the temporary connection position of the flange plate according to the first offset and the second offset to enable the butting precision of the steel pipe column 1 and the tool column 2 to be smaller than the first preset value. In step S14, the first offset and the second offset of one first measurement section 4 of the two ends of the steel pipe column 1 and the tool column 2 facing away from each other are generally used as main references for temporary connection of the adjusting flange, and the first offset and the second offset of each of the other first measurement sections 4 are used as review references.
The verticality of the steel pipe column 1 by the back-inserting method needs to be controlled to be 0.2%, in the embodiment, the first preset value is 0.1%, namely the butting precision of the steel pipe column 1 and the tool column 2 is controlled to be 0.1% in the butting stage of the steel pipe column 1 and the tool column 2, so that more control redundancy is provided for the subsequent steel pipe column 1 hoisting verticality control. If the difference between the butting precision of the steel pipe column 1 and the tool column 2 at the first measurement section 4 and the first preset value is 0.05 percent, a gasket is arranged on the offset side between the two flange plates of the end faces of the steel pipe column 1 and the tool column 2, and the thickness of the gasket is 0.5 mm. Such as: the difference value between the butting precision of the steel pipe column 1 and the tool column 2 at the first measurement section 4 and the first preset value is 0.15%, a cushion block of 0.5mm is arranged on the offset side corresponding to the offset direction of the steel pipe column 1, so that the steel pipe column 1 returns to the opposite direction of the offset direction, and the butting of the steel pipe column 1 and the tool column 2 can be adjusted rapidly and accurately according to the obtained butting precision of the steel pipe column 1 and the tool column 2. If the difference value between the butting precision of the steel pipe column 1 and the tool column 2 at the first measurement section 4 and the first preset value is 0.18%, two 0.5mm cushion blocks are padded on the offset side corresponding to the offset direction of the steel pipe column 1.
The perpendicularity control method of the steel pipe column by the back-inserting method in the embodiment further includes step S2, the hoisting perpendicularity of the steel pipe column 1 is controlled, and the steel pipe column 1 is hoisted by a crane 7 or a tower crane and the like, which is shown in fig. 5; step S2 includes the following steps:
s21, arranging two total stations 10 in a 90-degree manner by taking the tool post 2 as a reference point, as shown in FIG. 6;
s22, marking two ends of the corresponding side of the tool post 2 with a first measuring point 5 at two total stations 10 by a laser, as shown in fig. 4, each total station 10 measuring the coordinates of the upper and lower first measuring points 5 at the corresponding side, obtaining the deviation value of the corresponding side according to the coordinates of the upper and lower first measuring points 5 at each side, obtaining the total offset direction and the total offset distance of the tool post 2 according to the deviation value of the tool post 2 at two sides corresponding to the two total stations 10, obtaining the lifting verticality of the tool post 2 according to the total offset distance of the tool post 2, and calculating the lifting verticality as the prior art;
and S23, if the obtained hoisting verticality of the tool column 2 is larger than a second preset value, adjusting the steel pipe column 1 through a clamping device of the universal platform 8 according to the obtained total offset direction and the total offset distance of the tool column 2, so that the hoisting verticality of the steel pipe column 1 is smaller than the second preset value, and the second preset value is 0.2%. When the steel pipe column 1 is hoisted, the universal platform 8 can mechanically measure whether the steel pipe column 1 is vertical or not during hoisting. Because the butt joint precision of the tool column 2 and the steel pipe column 1 is controlled, the hoisting verticality of the steel pipe column 1 can be reflected through the hoisting verticality of the tool column 2. By adopting the above mode to retest the hoisting verticality of the tool column 2, the total offset distance, the total offset direction and the hoisting verticality of the tool column 2 can be more accurately obtained, and the hoisting verticality of the steel pipe column 1 can be conveniently controlled. And the hoisting verticality inspection of the steel pipe column 1 is completed together with the mechanical measurement of the universal platform 8 through manual measurement, so that a double-insurance mechanism for controlling the hoisting verticality of the steel pipe column 1 is realized.
Besides, in the embodiment, the steel reinforcement cage is improved, the top of the steel reinforcement cage is changed into the bell mouth, the maximum diameter of the top of the steel reinforcement cage is 8-12cm larger than the diameter of the bottom of the steel reinforcement cage, the contact between the stud and the steel reinforcement cage at the bottom of the steel pipe column 1 in the hoisting process of the steel pipe column 1 is avoided, and the influence on the hoisting verticality and the positioning of the steel pipe column 1 is reduced.
By adopting the perpendicularity control method of the steel pipe column by the rear insertion method, the butt joint precision, the butt joint offset and the butt joint offset direction of the steel pipe column 1 and the tool column 2 can be more accurately obtained, so that the butt joint of the steel pipe column 1 and the tool column 2 can be rapidly adjusted, the butt joint precision control effect of the steel pipe column 1 and the tool column 2 is better, and the efficiency is higher; the hoisting verticality of the steel pipe column 1 is checked through manual measurement and mechanical measurement of the universal platform 8, a double-insurance mechanism for controlling the hoisting verticality of the steel pipe column 1 is realized, the hoisting verticality, the total offset direction and the total offset distance of the tool column 2 can be more accurately obtained, and the hoisting verticality of the steel pipe column 1 can be conveniently controlled; the method is superior to the prior art, the butt joint precision of the butt joint process of the steel pipe column 1 and the tool column 2 is measured and controlled more quickly and accurately, the measurement of the hoisting verticality of the hoisting process of the steel pipe column 1 is more accurate, the hoisting verticality control of the hoisting process of the steel pipe column 1 is simpler, the method superior to the prior art is used for measuring the hoisting verticality of the steel pipe column 1, the hoisting verticality control of the steel pipe column 1 is more accurate, the verticality control effect of the steel pipe column 1 by the back-inserting method is better, and the overall control efficiency is higher.
Example 2
The embodiment provides a perpendicularity control method of a rear-inserting method steel pipe column, which is different from the embodiment in that step S2 is replaced by step S2' to control the hoisting perpendicularity of the steel pipe column 1; step S2' includes the following steps:
s21', two second measurement cross sections 6 are taken from the upper and lower end portions of the tool post 2, and at least three second measurement points 61 are respectively selected in the circumferential direction of each second measurement cross section 6, see fig. 7;
s22', measuring and acquiring coordinates of all second measuring points 61 through the total station 10;
s23', fitting the coordinates of all the second measuring points 61 of each second measuring section 6 to obtain the center coordinates of the corresponding second measuring section 6;
s24', obtaining the total offset direction and the total offset distance of the tool column 2 according to the circle center coordinates of the two second measurement sections 6, and obtaining the hoisting verticality of the tool column 2 according to the total offset distance of the tool column 2;
s25', if the obtained hoisting verticality of the tool column 2 is larger than a second preset value, adjusting the steel pipe column 1 through a clamping device of the universal platform 8 according to the obtained total offset direction and the total offset distance, so that the hoisting verticality of the steel pipe column 1 is smaller than the second preset value.
As a better option, in step S31, marking the upper and lower ends of the tool post 2 with the second measurement cross section 6 by one laser instrument on the same side of the tool post 2 would obtain two horizontal cursor straight lines, and then selecting the second measurement points 61 on the two cursor straight lines respectively, so that all the second measurement points 61 of the same second measurement cross section 6 are on the same circular surface, and the accuracy of obtaining the coordinates of the second measurement points 61 is higher, and the center of the second measurement cross section 6 can be better fitted, and this way only needs one laser instrument, which can reduce the number of laser instruments used. All the second measuring points 61 are on the same side, so that the total station 10 is only required to be arranged on the side, the operation difficulty is reduced, the cost is saved, and the construction efficiency is improved.
In this embodiment, at the 1 hoist and mount straightness control stage of hanging down of steel-pipe column, can directly obtain the centre of a circle coordinate that two second measured sections 6, whether the centre of a circle that can directly reflect two second measured sections 6 of instrument post 2 promptly is on same vertical line, and then can be quick, accurate reaction tool post 2 hoist and mount straightness, total skew direction and total skew distance, be convenient for control the hoist and mount straightness of hanging down of steel-pipe column 1. And the hoisting verticality inspection of the steel pipe column 1 is completed together with the mechanical measurement of the universal platform 8 through manual measurement, so that a double-insurance mechanism for controlling the hoisting verticality of the steel pipe column 1 is realized.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A perpendicularity control method of a rear-inserting method steel pipe column is characterized by comprising the steps of S1, controlling the butt joint precision of a steel pipe column (1) and a tool column (2); step S1 includes the following steps:
s11, respectively transversely placing the steel pipe column (1) and the tool column (2) on a base (3), aligning the corresponding end faces of the steel pipe column (1) and the tool column (2) and temporarily connecting the steel pipe column and the tool column through flange plates;
s12, selecting at least three first measurement sections (4) on the steel pipe column (1) and the tool column (2), wherein the two first measurement sections (4) are respectively located at the end parts of the steel pipe column (1) and the tool column (2) which are deviated from each other, marking a top measurement point (41) of the first measurement section (4) and a side measurement point (42) on one side of the first measurement section (4), all the side measurement points (42) are located on the same side, the side measurement point (42) and the top measurement point (41) of the same first measurement section (4) are distributed in an included angle of 90 degrees relative to the first measurement section (4), and respectively obtaining corresponding coordinates of the top measurement point (41) and the side measurement point (42) of each first measurement section (4);
s13, obtaining a first evaluation line according to the coordinates of the top measuring points (41) of two adjacent first measuring sections (4), and obtaining the distance between the coordinates of the top measuring points (41) of each of the rest first measuring sections (4) and the first evaluation line to obtain a first offset corresponding to the first measuring section (4); obtaining a second evaluation line according to the coordinates of the side measuring points (42) of two adjacent first measurement sections (4), and obtaining the distance between the coordinates of the side measuring points (42) of each of the other first measurement sections (4) and the second evaluation line to obtain a second offset of the corresponding first measurement section (4); then, the butting precision of the steel pipe column (1) and the tool column (2) at the corresponding first measuring section (4) is obtained through the first offset and the second offset at each first measuring section (4);
s14, if the butting precision of the steel pipe column (1) and the tool column (2) at the first measurement section (4) is larger than a first preset value, adjusting the temporary connection position of the flange plate according to the corresponding first offset and second offset to enable the butting precision of the steel pipe column (1) and the tool column (2) to be smaller than the first preset value.
2. The verticality control method of the steel pipe column with the back-inserting method according to claim 1, wherein in step S12, after the first measurement section (4) is selected, a rope (51) with two ends respectively connected with a plumb (52) is firstly spanned above the first measurement section (4), so that the plumb (52) at the two ends of the rope (51) are respectively positioned at two sides of the first measurement section (4), and the tangent position of the marking rope (51) and the side surface of the first measurement section (4) is a side surface measuring point (42).
3. The method for controlling the verticality of a steel pipe column according to claim 2, wherein in step S12:
after marking the position of the side measuring point (42), sticking a reflector plate on the rope (51) at the position corresponding to the side measuring point (42), and measuring by matching the total station (10) with the reflector plate to obtain the coordinate of the side measuring point (42);
after the position of the top measuring point (41) is marked, the prism is arranged at the position corresponding to the top measuring point (41), and the coordinates of the top measuring point (41) are obtained through the measurement of the total station (10) and the prism.
4. The method for controlling the verticality of a steel pipe column according to claim 1, wherein in step S12: the first evaluation line is obtained by coordinates of a first measurement section (4) farthest from the steel pipe column (1) and a top measurement point (41) on the first measurement section (4) adjacent to the first measurement section, and the second evaluation line is obtained by coordinates of a first measurement section (4) farthest from the steel pipe column (1) and a side measurement point (42) on the first measurement section (4) adjacent to the first measurement section.
5. The method for controlling the verticality of a steel pipe column according to claim 1, wherein in step S12: the first measuring sections (4) are located at two ends of the tool column (2), two ends of the steel pipe column (1) and the longitudinal middle part.
6. The method for controlling the verticality of a steel pipe column according to claim 1, wherein in step S14: the first preset value is 0.1%.
7. The perpendicularity control method of a rear insertion steel pipe column according to any one of claims 1 to 6, characterized by further comprising a step S2 of controlling the hoisting perpendicularity of the steel pipe column (1); step S2 includes the following steps:
s21, arranging the two total stations (10) in 90 degrees by taking the tool column (2) as a reference point;
s22, marking two ends of the corresponding side of the tool post (2) with a first measuring point (5) respectively at two total stations (10) through a laser instrument, measuring the coordinates of the two first measuring points (5) at the corresponding side by each total station (10), obtaining a deviation value of the corresponding side according to the coordinates of the two first measuring points (5) at each side, obtaining a total deviation direction and a total deviation distance of the tool post (2) according to the deviation values of the tool post (2) at two sides corresponding to the two total stations (10), and obtaining the lifting perpendicularity of the tool post (2) according to the total deviation distance of the tool post (2);
s23, if the obtained hoisting verticality of the tool column (2) is larger than a second preset value, adjusting the steel pipe column (1) through a clamping device of the universal platform (8) according to the obtained total offset direction and the total offset distance of the tool column (2), and enabling the hoisting verticality of the steel pipe column (1) to be smaller than the second preset value.
8. The perpendicularity control method of a rear insertion steel pipe column according to any one of claims 1 to 6, further comprising a step S2' of controlling the hoisting perpendicularity of the steel pipe column (1); step S2' includes the following steps:
s21', two second measuring sections (6) are taken at two ends of the tool column (2), and at least three second measuring points (61) are respectively selected in the circumferential direction of each second measuring section (6);
s22', measuring and acquiring coordinates of all second measuring points (61) through the total station (10);
s23', fitting the coordinates of all the second measuring points (61) of each second measuring section (6) to obtain the center coordinates of the corresponding second measuring section (6);
s24', obtaining the total offset direction and the total offset distance of the tool column (2) according to the circle center coordinates of the two second measurement sections (6), and obtaining the hoisting verticality of the tool column (2) according to the total offset distance of the tool column (2);
s25', if the obtained hoisting verticality of the tool column (2) is larger than a second preset value, adjusting the steel pipe column (1) through a clamping device of the universal platform (8) according to the obtained total offset direction and the total offset distance, so that the hoisting verticality of the steel pipe column (1) is smaller than the second preset value.
9. The method for controlling the verticality of a steel pipe column with a backward insertion method according to claim 8, wherein in step S21', the two ends of the tool column (2) are marked with the second measuring section (6) by a laser at the same side of the tool column (2), and then the second measuring point (61) is selected.
10. The verticality control method of the back-inserted steel pipe column according to claim 8, wherein the top of the reinforcement cage is a bell mouth, and the maximum diameter of the top of the reinforcement cage is 8-12cm larger than the diameter of the bottom of the reinforcement cage.
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